Question

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化工-單元操作
大神求解

13. Furnace stack-E. Air (pe = 0.08 lbm/ft3) flows through a furnace where
it is burned with fuel to produce a hot gas (Pg 0.05 lbm/ft3) that flows up the
stack, as in Fig. P1.13. The pressures in the gas and the immediately surrounding
air at the top of the stack at point A are equal.
A Gas out
A
Air
Air
H= 100 ft
Gas
Air in
Furnace
B
Ah
Water manometer (relative positions
of levels not necessarily correct)
Fig. P1.13 Furnace stack.
What is the difference Ah (in.) in levels of the water in the manometer con-
nected between the base B of the stack and the outside air at point C? Which
side rises? Except for the pressure drop across the furnace (which you need not

worry about), treat the problem as one in hydrostatics. That is, ignore any fric-
tional effects and kinetic energy changes in the stack. Also, neglect compressibility
effects.

單操 化工 化工流體力學 流體力學 furnace stack